Want to rock the sweet rainbow Team Rocket shirt from Pokemon GO? Look no further! We have your Team Rocket Rainbow swag right here :)
In game item is called "Team Rainbow Rocket Top"
For Reference:
https://www.forbes.com/sites/insertcoin/2018/02/15/team-rocket-arrives-in-pokemon-go-but-not-in-the-way-youd-think/#68c448567f64